A Florida sheriff has banned staff from wearing face masks at work.
Marion County Sheriff Billy Woods’s order also includes visitors to the office. It is thought to be the first such mask ban for US law enforcement.
Sheriff Woods said it was vital that officers’ orders were clearly understood and that anyone coming to the station be identifiable.
Florida is one of the states hardest hit by the coronavirus pandemic, with over 550,000 cases and 8,700 deaths.
Sherriff Woods’ order, issued on Tuesday, has some exemptions, including for those working in jails where the infection risk is higher, or at the county courthouse, hospitals or schools.
More than 200 inmates at the county’s jail have tested positive, according to the Ocala-Star Banner, which first reported on the mask ban.
At least 36 jail employees have also tested positive, and an infected nurse who worked there has died, the newspaper reported.
Sheriff Woods, whose jurisdiction is about 80 miles north of Orlando (130km), also said visitors must remove their masks before entering the lobby of the station, linking his decision to recent protests against police brutality and racism.
“In light of the current events when it comes to the sentiment and/or hatred toward law enforcement in our country today, this is being done to ensure there is clear communication and for identification purposes of any individual walking into a lobby,” he wrote in an email to employees.
In his email, Mr Woods says he has carefully studied the issue and has found the evidence for wearing a mask to be inconclusive.
Global health experts universally agree that wearing a mask over your face and nose is necessary to prevent the spread of moisture droplets that can carry the virus. Infected individuals may not experience symptoms of illness, making it necessary for everyone to wear a mask - in addition to social distancing and hand washing.
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The US currently has 5.2m infections - far more than any other country - and over 166,000 deaths, according to Johns Hopkins University.
The wearing of masks has been fiercely debated along political lines in the US, with President Donald Trump refusing to wear one in public for months.
“I’m getting used to wearing a mask,” he told reporters in July. He had previously mocked political opponents and journalists for wearing them.
Wearing a mask in the US has often acquired political connotations - Republican supporters of Mr Trump are less likely to don masks than Democrats.
According to a New York Times analysis of Centers for Disease Control and Prevention data, there have been around 200,000 so-called “excess deaths” in the US during the pandemic - meaning some 60,000 more deaths have to be added to the existing toll.